A group of four former Cassiday, Schade LLP partners has splintered from the firm, formed a new one and hired six lawyers within the past month.Brennan, Garvey LLC was founded July 3 by former Cassiday, Schade executive committee members Mark M. Brennan and Catherine L. Garvey and former partners Robert S. Burtker and Anthony J. Longo.Those four recruited six other attorneys with ties to their former firm. That includes Joseph A. Camarra, who retired in 2013, and joined Brennan, Garvey as of counsel. Five other associates …